Swann-Morton (Microbiological Laboratory Services) Ltd uses a purpose built microbiology laboratory providing an expert service for monitoring and identifying microbiological contamination, both environmental and product borne.
The laboratory is certified to ISO 13485. View our certificate here
For existing customers, please download our Test Request Form
A range of microbiological services can be carried out, both in the laboratory and on-site. We can also offer advice and consultancy for any microbiology or hygiene issues. Our clients include medical device manufacturers and re-processing service providers including hospital Sterile Services Units.
Testing that can be carried out include the following:
- Validation of Sterilisation using Gamma Irradiation - ISO 11137 Method 1 / Method VDmax25
- Medical Device Cleaning Validations
- Specialised Projects
Environmental microbiological testing
A variety of tests can be carried out in accordance with ISO 14698 and ISO 14644 to assess the cleanliness and effectiveness of your clean areas. Testing can be carried out by a microbiologist or technician from Swann Morton at your site, or we can send you the necessary plates, bottles etc for you to remotely carry out the testing yourself. Please contact us to find out if on-site testing is available in your area.
- Airborne Particles
- Active Air Sampling
- Settle Plates
- Finger Dab Hygiene Testing
- Contact Plates
- Water Testing
- Endotoxin (pyrogen) Testing
- Soaps / Detergents
- Incubation Service
- Identification Work
Interpretation of Results / Reports
Following incubation, the number of colony forming units (cfu) is calculated for each agar plate. By examining the morphology of the colonies, the organisms can be categorised into broad groups.
Typically for bacteria, these groups are, "Staphylococcus / Micrococcus", "Bacillus" or "Other".
For fungal contamination, colonies are classified as "Mould" or "Yeast".
Further identification can be carried out using Gram stain and biochemical techniques at the customer's request. Identification work
A detailed report is created for each test, giving information about the type of testing, the numbers and types of colonies found and details of types and batch numbers of the media used. You will be supplied with these reports in the post.
Where appropriate, a comment will be put on the report offering information and advice if any of the tests are unusual or out of specification.
In the event of an adverse result, we will contact you to advise you of this as soon as possible.
Warning / Action Limits
For microbiological testing, there are few guidelines describing exactly how much contamination actually constitutes an adverse result.
Initially, when analysing your results we will use our extensive experience to identify any bad results and advise you on courses of action to take.
Over time, as we build up historical data for your facility, it will become possible to use this information to establish warning and action limits for each test. For example, for contact plates a warning limit of 10 cfu and an action limit of 20 cfu per position could be set.
Swann-Morton (Microbiological Laboratory Services) Limited
Tel: +44 (0)114 249 5911